Display rack



FIG. 1 is a front and left side perspective view of a display rack showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof.

The right side not shown is the same in appearance as the rear view as shown in FIG. 2. 

The ornamental design for a display rack design, as shown and described. 